<template>
  <div>
    <!-- 面包屑组件 -->
    <bread></bread>
    <!-- 卡片内容区域 -->
    <el-card>
      <el-row>
        <el-col >
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        class="treeTable"
        :data="cateList"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
        :show-row-hover="false"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color:lightgreen;"
          ></i>
          <i class="el-icon-error" v-else style="color:red"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level===0">一级</el-tag>
          <el-tag type="success" size="mini" v-else-if="scope.row.cat_level===1">二级</el-tag>
          <el-tag type="warning" size="mini" v-else>三级</el-tag>
        </template>
        <template slot="opt" slot-scope="scope">
          <el-button
            type="primary"
            icon="el-icon-edit"
            size="mini"
            @click="showEditCateDialog(scope.row.cat_id)"
          >编辑</el-button>
          <el-button
            type="danger"
            icon="el-icon-delete"
            size="mini"
            @click="showDelCateDialog(scope.row.cat_id)"
          >删除</el-button>
        </template>
      </tree-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3,5,10,15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
      <!-- 添加分类的对话框 -->
      <el-dialog
        title="添加分类"
        :visible.sync="addCateDialogVisible"
        width="50%"
        @close="addCateDialogClosed"
      >
        <el-form
          :model="addCateForm"
          :rules="addCateFormRules"
          ref="addCateFormRef"
          label-width="100px"
          class="demo-ruleForm"
        >
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="addCateForm.cat_name"></el-input>
          </el-form-item>
          <el-form-item label="父级分类：">
            <el-cascader
              expand-trigger="hover"
              :options="ParentCateList"
              :props="cascaderProps"
              v-model="selectedKeys"
              @change="parentCateChanged"
              clearable
              change-on-select
            ></el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addCateDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addCate">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 修改区域 -->
      <el-dialog
        title="修改分类"
        :visible.sync="editCateDialogVisible"
        width="50%"
        @close="editCateDialogClosed"
      >
        <el-form
          :model="editCateForm"
          :rules="editCateFormRules"
          ref="editCateFormRef"
          label-width="100px"
          class="demo-ruleForm"
        >
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="editCateForm.cat_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editCateDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editCate">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
import bread from "../bread";
import API from "../API/Api"
export default {
  name: "",
  data() {
    return {
      // 分页
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      total: 0,
      // 数据列表
      cateList: [],
      columns: [
        {
          label: "分类名称",
          prop: "cat_name"
        },
        {
          label: "是否有效",
          type: "template",
          template: "isok"
        },
        {
          label: "排序",
          type: "template",
          template: "order"
        },
        {
          label: "操作",
          type: "template",
          template: "opt"
        }
      ],
      // 控制添加分裂对话框的显示隐藏
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0
      },
      // 添加验证
      addCateFormRules: {
        cat_name: [
          { required: true, message: "请输入活动名称", trigger: "blur" },
          { min: 2, max: 10, message: "长度在 2 到 10 个字符", trigger: "blur" }
        ]
      },
      ParentCateList: [],
      cascaderProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children"
      },
      selectedKeys: [],
      editCateDialogVisible: false,
      editCateForm: {},
      editCateFormRules: {
        cat_name: [
          { required: true, message: "请输入活动名称", trigger: "blur" },
          { min: 2, max: 10, message: "长度在 2 到 10 个字符", trigger: "blur" }
        ]
      }
    };
  },
  mounted() {
    this.getCatList();
  },
  methods: {
    // 获取商品分类数据
    getCatList() {
      API
        .getCatList(this.queryInfo)
        .then(res => {
          if (res.meta.status !== 200) {
            return this.$message.error("获取商品分类失败");
          }
          // console.log(res);
          this.cateList = res.data.result;
          this.total = res.data.total;
        });
    },
    // 监听 pagesize 改变
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCatList();
    },
    // 监听 pagenum 改变
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage;
      this.getCatList();
    },
    // 点击按钮展示添加分类
    showAddCateDialog() {
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },
    // 获取父级分类的数据列表
    getParentCateList() {
      API
        .getParentCateList()
        .then(res => {
          if (res.meta.status !== 200) {
            return this.$message.error("获取父级分类数据失败");
          }
          console.log(res.data);
          this.ParentCateList = res.data;
        });
    },
    // 选择项发生变化触发这个函数
    parentCateChanged() {
      // 如果 selectedKeys 数组中的length 大于 0,证明选中的父级分类

      console.log(this.selectedKeys);
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ];
        // 为当前分类的等级赋值
        this.addCateForm.cat_level = this.selectedKeys.length;
        return;
      } else {
        this.addCateForm.cat_pid = 0;
        this.addCateForm.cat_level = 0;
      }
    },
    // 点击添加数据
    addCate() {
      console.log(this.addCateForm);
      this.$refs.addCateFormRef.validate(valid => {
        if (!valid) return;
        API.addCate(this.addCateForm).then(res => {
          console.log(res);
          if (res.meta.status !== 201) {
            return this.$message.error("添加分类失败");
          }
          this.$message.success("添加分类成功");
          this.getCatList();
          this.addCateDialogVisible = false;
        });
      });
    },
    // 清空添加
    addCateDialogClosed() {
      this.$refs.addCateFormRef.resetFields();
      this.selectedKeys = [];
      this.addCateForm.cat_level = 0;
      this.addCateForm.cat_pid = 0;
    },

    // 点击修改
    showEditCateDialog(id) {
      console.log(id);
      this.editCateDialogVisible = true;
      API.showEditCateDialog(id).then(res => {
        console.log(res);
        if (res.meta.status !== 200) {
          return this.$message.error("获取失败");
        }
        this.editCateForm = res.data;
      });
    },
    editCate() {
      console.log(this.editCateForm.cat_id);
      this.$refs.editCateFormRef.validate(valid => {
        if (!valid) return;
        API
          .editCate(this.editCateForm.cat_id, this.editCateForm)
          .then(res => {
            console.log(res);
            if (res.meta.status != 200) {
              return this.$message.error("修改失败");
            }
            this.$message.success("修改成功");
            this.editCateDialogVisible = false;
            this.getCatList();
          });
      });
    },
    // 清空添加
    editCateDialogClosed() {
      this.$refs.editCateFormRef.resetFields();
      this.selectedKeys = [];
      this.editCateForm.cat_level = 0;
      this.editCateForm.cat_pid = 0;
    },
    // 删除
    async showDelCateDialog(id) {
      var confirm = await this.$confirm(
        "此操作将永久删除该文件, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(err => err);
      console.log(confirm);
      if (confirm !== "confirm") {
        return this.$message.error("取消删除");
      }
      API.showDelCateDialog(id).then(res => {
        if (res.meta.status !== 200) {
          return this.$message.error("删除失败");
        }
        this.$message.success("删除成功");
        this.getCatList();
      });
    }
  },
  computed: {},
  created() {},
  components: {
    bread
  },
  watch: {},
  getters: {}
};
</script>

<style scoped>
.treeTable {
  margin-bottom: 15px;
}
</style>